Utilizing Natural Illuminance through Indoor Daylighting Systems for Green Buildings

Authors

Kiranjot Kaur, Post-Carbon Research Centre, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, Australia Sustainable Building Innovation Laboratory (SBi Lab), School of Property, Construction and Project Management, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, Australia Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India CSIR- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh - 160030, IndiaFollow
Priyadarsini Rajagopalan, Post-Carbon Research Centre, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, Australia Sustainable Building Innovation Laboratory (SBi Lab), School of Property, Construction and Project Management, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, AustraliaFollow
Jin Woo, Post-Carbon Research Centre, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, Australia Sustainable Building Innovation Laboratory (SBi Lab), School of Property, Construction and Project Management, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, AustraliaFollow
Harry Garg, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India CSIR- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh - 160030, IndiaFollow

Abstract

This study explores energy-efficient passive tubular daylighting systems which utilizes natural lighting, reduce energy consumption and improve occupant well-being in buildings. For this, three passive daylighting collectors configuration of flat plate, circular dome and circular Fresnel lens were modelled using AutoCAD and SolidWorks and analysed using ray tracing software TracePro 7.3.4. The light transportation was done using a highly reflective light pipe with a reflectivity of 95%. The collectors were made from Polymethyl methacrylate (PMMA) with refractive index of 1.49 because of highly transmission efficiency, weather resistance, shock resistance, blocks UV, lightweight and cost-effective alternative to glass. The Monte Carlo ray tracing method was employed to assess the optical performance within the photometric range of 380 nm to 720 nm. The results demonstrated that circular Fresnel lens achieved better illuminance and efficiency compared to conventional systems, highlighting their potential for enhancing indoor environmental quality in green buildings.

The paper will be presented:

Online

Primary U.N. Sustainable Development Goals (SDG)

Affordable and Clean Energy - - Ensure access to affordable, reliable, sustainable and modern energy for all

Secondary U.N. Sustainable Development Goals (SDG)

Sustainable Cities and Communities - - Make cities and human settlements inclusive, safe, resilient and sustainable

Primary CIB Task Group OR Working commission

TG124 – Net Zero Carbon Building Design and Construction Practices

Secondary CIB Task Group OR Working commission

TG97 – Nature-Based Solutions for Climate Resilient Buildings and Communities

Recommended Citation

Kaur, Kiranjot; Rajagopalan, Priyadarsini; Woo, Jin; and Garg, Harry (2025) "Utilizing Natural Illuminance through Indoor Daylighting Systems for Green Buildings," CIB Conferences: Vol. 1 Article 140.
DOI: https://doi.org/10.7771/3067-4883.1978